}
@Override
public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer)
throws IOException {
GetDelegationTokenRequestProto req = GetDelegationTokenRequestProto
.newBuilder()
.setRenewer(renewer.toString())
.build();
try {
return PBHelper.convertDelegationToken(rpcProxy.getDelegationToken(null, req).getToken());